87783125 has 10 divisors (see below), whose sum is σ = 109694574. Its totient is φ = 70226000.

The previous prime is 87783119. The next prime is 87783127. The reversal of 87783125 is 52138778.

It can be written as a sum of positive squares in 5 ways, for example, as 23639044 + 64144081 = 4862^2 + 8009^2 .

It is not a de Polignac number, because 87783125 - 2⁶ = 87783061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87783127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 69602 + ... + 70851.

Almost surely, 2^87783125 is an apocalyptic number.

It is an amenable number.

87783125 is a deficient number, since it is larger than the sum of its proper divisors (21911449).

87783125 is an equidigital number, since it uses as much as digits as its factorization.

87783125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140473 (or 140458 counting only the distinct ones).

The product of its digits is 94080, while the sum is 41.

The square root of 87783125 is about 9369.2649124678. The cubic root of 87783125 is about 444.4303192849.

The spelling of 87783125 in words is "eighty-seven million, seven hundred eighty-three thousand, one hundred twenty-five".